Hi Everybody, Buzz here. Jacob, i'll have to disagree a bit. Among other things at work i teach mechanics to taxi 727's, 737's, 757's, A320's...... things that UAL leaves at PDX overnight.
Yes, the rudder pedals are connected to the nose gear steering. Buy on a 737 you only get 7 degrees of motion. It's enough to keep you straight on the runway once you're lined up. But not enough to make the turns on the taxiway.
My favorite DC-3 has -no- connection between the rudder and tailwheel. You are expected to use a lot of rudder and the "opposite engine" to make the airplane turn. You sort of blow it around a corner: Left turn? full left rudder and power up the right engine.
On modern airliners there is a "tiller" (A320's and 747's have one on each side) near the captain's outboard knee. That gives up to 78 degrees of turn when you swing it. Yes, it's power steering.
DC-8's looked like a 6 inch diameter wheel. 737's have a 1/4th of a wheel. 757 /767 have a football shaped knob on what looks like a window-roll-down crank, and the A320's tiller looks like a horizontal ski pole grip. I can imagine you have difficulty taxiing on the PC. Better read up on what engages nose wheel steering is the only thing that comes to mind. Got hydraulics? No Hydraulics, no steering. One instructor did that to me in the DC-8 simulator a dozen years ago....... just like the movie "Airplane" with the 747 through the glass. Yes, i do check brake pressure before i make the last turn into the gate!
Buzz Fuselsausage: Line Mechanic by night, DC-3 Crew Chief by choice